EP2219708A1 - Vorrichtung zum lösbaren kuppeln einer antriebsspindel mit der drückvorrichtung einer spritzenpumpe - Google Patents
Vorrichtung zum lösbaren kuppeln einer antriebsspindel mit der drückvorrichtung einer spritzenpumpeInfo
- Publication number
- EP2219708A1 EP2219708A1 EP08859950A EP08859950A EP2219708A1 EP 2219708 A1 EP2219708 A1 EP 2219708A1 EP 08859950 A EP08859950 A EP 08859950A EP 08859950 A EP08859950 A EP 08859950A EP 2219708 A1 EP2219708 A1 EP 2219708A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling element
- coupling
- recess
- pressing device
- drive spindle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D1/101—Quick-acting couplings in which the parts are connected by simply bringing them together axially without axial retaining means rotating with the coupling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/142—Pressure infusion, e.g. using pumps
- A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
- A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
- A61M2005/14573—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons with a replaceable reservoir for quick connection/disconnection with a driving system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
- F16D2001/102—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via polygon shaped connections
Definitions
- the invention relates to a device for releasably coupling a drive spindle with the pressing device of a syringe pump.
- a (possibly pre-filled) syringe is inserted into the syringe pump so that the syringe barrel is held by the housing of the syringe pump.
- the syringe plunger which is pressed into the cylinder for delivery of the syringe contents, is actuated by a slide.
- a spindle drive is provided, which converts the rotational movement of the drive in a translational movement.
- the drive is decoupled from the pressing device.
- DE 38 38 465 A1 describes a syringe pump in which a coupling element is provided in order to avoid engagement and disengagement of the drive elements.
- the coupling element which may consist of two gears or a nut, is permanently engaged with the drive spindle and is blocked or released via brake elements.
- the brake elements are actuated against the action of a spring by an actuating button via a brake pipe.
- the gears that interact with the drive spindle are thus blocked by the brake elements in the normal state.
- the brake elements can be released via the actuating button in order to release the gears.
- the actuating button is released and the spring pushes the brake tube back to the starting position, in which the brake elements block the gears.
- a disadvantage of this device is that when coupling always a force directly on the threads of the drive spindle and the drive unit (mother or gears) acts. Due to the high flank pressure and due to the inevitable angular play between the flanks wear is great, which in the long run the precision of the pump is compromised. In addition, the braking elements that lock the gears via friction, a relatively large wear.
- the object of the invention is thus to provide a device according to the preamble, which allows for long periods of high accuracy of the syringe pump, even if high torques are transmitted.
- a preferred embodiment of the invention is that are provided as a means for coupling the drive spindle to the drive a first coupling element with a recess and a second coupling element with a corresponding polygonal-shaped projection for engagement in the recess.
- first coupling element with a recess which may be referred to as a "coupling bell"
- second coupling element with a projection for engaging the recess of the first coupling element In the coupled state, the projection is engaged in the recess, in the uncoupled state, it is not engaged.
- the first coupling element is formed on the drive spindle and the second coupling element on the drive.
- the first coupling element is formed on the drive and the second coupling element on the drive spindle.
- the recess and the projection are each formed polygonal.
- the polygonal shaped projection of the second coupling element engages during the Kuppeins in the polygonally shaped recess of the first coupling element, so that a positive connection between the drive spindle and the drive is formed.
- the power transmission is thus directly on the drive spindle and not a thread, which is subject to heavy wear. Therefore, higher torques can be transmitted while reducing the angular play.
- a preferred embodiment of the invention is that the recess are formed as a hexagon socket and the projection as an external hexagon.
- Hexagon (here: a recess or a projection, each having the shape of a regular hexagon) are easy to produce and at the same time allow the transmission of high torques.
- a development of the invention is that the recess are formed as a hexalobular and the projection as a hexalobular.
- This design as a six-round (six-pointed star with rounded tips and corners, so a waveform, as it is known from Torx® screw driving profiles) allows optimal power transmission.
- the wave profile also facilitates the engagement of the second coupling element in the first coupling element.
- the means for positive coupling are formed as tapered coupling elements. This means that there is no or only a slight positive engagement in the entry region of the coupling elements and only with increasing entry depth, so progressing coupling process of complete positive engagement is achieved. Ideal in this context is a linear increase of the positive connection from the inlet region to the maximum positive locking, which should be reached after about one third of the depth of the recess in order not to reduce the transmittable torque too much.
- the mecanicsechsrund in the region of the opening of the recess is not formed or only to a small extent and takes only with increasing depth (about one third of the depth of the recess) a Form that corresponds essentially to the hexalobular (plus the required tolerance).
- the same can also apply to the hexalobular.
- the torque transmitting edge is thus less pronounced and / or rounded in the inlet region of the recess or the projection, which facilitates the engagement of the projection in the recess. This ensures that even when not exactly superimposed overlap of projection and recess during the coupling process, a gentle engagement takes place.
- Fig. 3 is a sectional view of a coupling device according to the
- the first coupling element 1 has a polygonal-shaped recess 2, which in the present example is designed as a hexalobular recess (according to ISO 10664-30, corresponding to an mecanictorx® design). It is advantageous that the mecanicsechsrund is tapered, ie that with increasing depth of the recess 2, the shape of the hexalobular is increasingly pronounced (preferably linearly increasing) until finally the hexalobular is fully formed. This ensures that, regardless of the position of the first coupling element 1 to the second coupling element 3 is in each case a soft engagement. The depth over which the hexalobular runs may vary according to requirements but should not exceed one third of the hexalobular not to reduce the transmissible torque too much.
- the first coupling element 1 has a bore through which the drive spindle extends.
- the corresponding second coupling element 3 is shown in FIGS. 2a, 2b and 2c.
- a trained as suitssechsrund projection 4 is provided, the outer dimensions substantially (up to the tolerance) corresponds to the internal dimensions of the hexalobular of the first coupling element 1 and is thus formed for positive engagement in the same.
- the second coupling element 3 also has a central bore in order to be able to apply it to the drive spindle.
- the projection may be formed tapering or both the recess and the projection.
- a coupling device according to the invention is shown.
- the lower end of a drive spindle 10 is axially rotatably mounted in a bearing housing 11 by means of a ball bearing 12.
- An outer hexagon 13, which has a through hole, is pushed onto the lower end of the drive spindle 10 and fixed by a Verestiftung 14 at her.
- a hexalobular recess 15 is displaceably arranged axially along the drive spindle 10 by means of a sliding bearing 16.
- the external hexagon 13 is designed to engage in the hexalobular recess 15.
- a spring 17 presses in the normal state, the hexalobular 15 in the intendsechsrund 13, so that the inner six-round 15 and six-o-half 13 are engaged engaging.
- the hexalobular 15 can be solved via a pivot lever 18 against the action of the spring 17 from the engagement with the hexalobular 13 and thus a rapid axial displacement of the pressing device for the syringe (not shown) are possible.
- the pivot lever 18 is actuated by the compression of the lever 19 (against the action of another spring), at the ends 20 of the syringe plunger is held.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Hematology (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
- Screen Printers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE200710059803 DE102007059803A1 (de) | 2007-12-11 | 2007-12-11 | Vorrichtung zum lösbaren Kuppeln einer Antriebsspindel mit der Drückvorrichtung einer Spritzenpumpe |
| PCT/DE2008/001824 WO2009074125A1 (de) | 2007-12-11 | 2008-11-07 | Vorrichtung zum lösbaren kuppeln einer antriebsspindel mit der drückvorrichtung einer spritzenpumpe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2219708A1 true EP2219708A1 (de) | 2010-08-25 |
| EP2219708B1 EP2219708B1 (de) | 2017-02-22 |
Family
ID=40445751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08859950.1A Active EP2219708B1 (de) | 2007-12-11 | 2008-11-07 | Vorrichtung zum lösbaren kuppeln einer antriebsspindel mit der drückvorrichtung einer spritzenpumpe |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2219708B1 (de) |
| DE (1) | DE102007059803A1 (de) |
| WO (1) | WO2009074125A1 (de) |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2734504A (en) * | 1956-02-14 | Hypodermic injection devices | ||
| US4273122A (en) * | 1976-11-12 | 1981-06-16 | Whitney Douglass G | Self contained powered injection system |
| US4767277A (en) * | 1981-04-17 | 1988-08-30 | Ingersoll-Rand Company | Fiber-filled polymer impeller |
| DE3150623C2 (de) | 1981-12-21 | 1983-12-01 | B. Braun Melsungen Ag, 3508 Melsungen | Druckinfusionsapparat für medizinische Anwendungen |
| US4529401A (en) * | 1982-01-11 | 1985-07-16 | Cardiac Pacemakers, Inc. | Ambulatory infusion pump having programmable parameters |
| DE3838465A1 (de) | 1988-11-12 | 1990-05-17 | Fresenius Ag | Spritzenpumpe |
| US5300031A (en) * | 1991-06-07 | 1994-04-05 | Liebel-Flarsheim Company | Apparatus for injecting fluid into animals and disposable front loadable syringe therefor |
| US5618273A (en) * | 1995-03-27 | 1997-04-08 | Ultradent Product, Inc. | Syringe apparatus with threaded plunger for delivering tooth composites and other solid yet pliable materials |
| US5993423A (en) * | 1998-08-18 | 1999-11-30 | Choi; Soo Bong | Portable automatic syringe device and injection needle unit thereof |
| KR200168880Y1 (ko) * | 1999-08-18 | 2000-02-15 | 박종환 | 한손사용 가능한 주사기 |
| US6461111B1 (en) * | 2000-08-25 | 2002-10-08 | Ingersoll-Rand Company | Tapered polygon coupling |
| US6381933B1 (en) * | 2000-11-27 | 2002-05-07 | New Holland North America, Inc. | Shaft coupling with tapered splines for a pull-type forage harvester |
| US6569122B2 (en) * | 2001-01-18 | 2003-05-27 | Ultradent Products, Inc | Syringe apparatus for delivering light activated materials |
| WO2002083209A1 (en) * | 2001-04-13 | 2002-10-24 | Nipro Diabetes Systems | Drive system for an infusion pump |
| DE10243279A1 (de) * | 2002-09-18 | 2004-03-25 | Volkswagen Ag | Kupplung mit konischer Verzahnung einer Welle-Nabe-Verbindung |
| DE102004037782B3 (de) * | 2004-08-03 | 2006-06-29 | Sew-Eurodrive Gmbh & Co. Kg | Welle, Getriebe, Getriebebaukasten und Antriebskomponente |
| ATE415181T1 (de) * | 2005-02-23 | 2008-12-15 | Mallinckrodt Inc | Stützplattenadapter für einen spritzenkolben |
-
2007
- 2007-12-11 DE DE200710059803 patent/DE102007059803A1/de not_active Ceased
-
2008
- 2008-11-07 EP EP08859950.1A patent/EP2219708B1/de active Active
- 2008-11-07 WO PCT/DE2008/001824 patent/WO2009074125A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009074125A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102007059803A1 (de) | 2009-06-18 |
| WO2009074125A1 (de) | 2009-06-18 |
| EP2219708B1 (de) | 2017-02-22 |
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